Attachment plug cap of the softrubber type



Dec. 6, 1938. v F. c. KVOLLATH 2,139,450

ATTACHMENT PLUG CAP THE SOFT RUBBER TYPE Original Filed May 26, 1932 FLEXIBLE RUBBER FLEXIBLE RUBBER Patented Dec. 6, 1938 UNITED STATES ATTACHDIENT PLUG CAP OF THE SOFT- RUBBER TYPE Francis C. Kollath, Chicago, Ill., assignor, by mesne assignments, to Belden Manufacturing Company, Chicago, 111., a. corporation of Illinois Original application May 26, 1932, Serial No. 613,640. Divided and this application October 29, 1934, Serial No. 750,554

7 2 Claims.

This invention relates to improvements in attachment plug caps of the soft-rubber type.

An object of the invention is to provide an attachment plug cap having a casing formed 5 of soft, flexible, resilient, rubber-like material,

and. having novel means for removably supporting the combined contact jack and wiring terminal members with respect to the casing.

Another object is to,provide an arrangement 10 wherein the combined contact jack and wiring terminal members are removably secured to a soft, flexible, rubber-like casing by means of screws threadedly engaging the casing, said casing having'recesses formed therein to accommo- 5 date the shanks of binding screws which threadedly engage the terminal portions of said members.

plug cap of the character aforementioned where- '20 in each combined contact jack and wiring terminal member is positioned upon a ledge offset inwardly from the lower end of the soft rubber casing to afford a wiring cavity or recess of proper form and dimensions.

Other objects and advantages of will hereinafter appear.

This application is a division of my'application, Serial No. 613,640, filed May 26, 1932, Patent No. 1,982,169 having issued thereon under 30' date of November 27, 1934.

The accompanying drawing illustrates an embodiment of the invention which will now be described, it being understood that the embodiment illustrated is susceptible of modification 1 35 as to certain details thereof without departing from the scope of the'appended claims.

In the drawing,'Figure,1 is a plan view of a rubber attachment plug cap constructed in accordance with my invention, and

'40 v 2 is a sectional view on the line 2--2 of Fig.

Referring to the drawing, the numeral 5 designates the cap body which is formed of soft, flexible, resilient material, such as rubber. Body .45 5 as shown isprovided with an annular flat ledge 6 which is offset inwardly from one end thereof to produce shoulders I and 8 which are arranged in a common plane and in diametrically opposed relationship to each other.

50 I provide a pair of one-piece combined contact jack and wiring terminal members, the contact jack portions of which are respectively designated by the numerals 9 and the flat base portions of which are designated by the numerals Ill.

25 the invention 55 Said flat base portions III are seated upon the Another object is to provideam attachment.

aforementioned shoulders i and 8 on diametrically opposite sides of a central passage ll, through which the electric conductors (not shown) are adapted to extend for attachment thereof to the wiring terminal ends 10' of said flat base portions l0. Said ends III are respectively provided with tapped openings to receive the shanks of binding screwsv I Body is provided 'with a pair of cylindrical recesses to provide clearance for the shanks of binding screws lll one of said recesses being shown in dotted lines at l3 in Fig. 2.

The ends Ill of said flat base portions II are provided with drilled or punched openings to 'provide clearance for the respective securing screws I2. The screws l2 threadedly engage the soft rubber and removably fix the respective combined contact jack and wiring terminal members to the casing-said screws [2 preferably being of the tapered shank form illustrated in Fig. 2.

Plug caps constructed in accordance with my invention are adapted to be wired in any one of theseveral ways common in the artthat is by leading the conductors directly from passage II to the respective binding screws ll", or by snubbing said wires around the respective contact jack portions 9. In either case the conductors may be provided with a knot or other form of strain relief device, the passage ll being provided with a flared or enlarged inner end II to receive and retain the knot in the conductor cord. The advantages of the combination of elements disclosed herein will be apparentto those skilled in the art. By reason of the novel means for resiliently mounting the combined contact jack and wiring terminal members the complete device is enabled to withstand extremely rough usage. Moreover, by my arrangement I am enabled to employ combined contact jack and wiring terminal members of a character which may be standard for the usualv plug caps of "hard molded insulation, thus minimizing the cost of these parts. The securing elements I! may and preferably do consist of wood screws of a well known commercial form. The soft rubber body 5 is of exceedingly simple form whereby molding thereof is facilitated, it being noted that there is no interlocking connection between body I, and either of the molding dies as an incident to the molding operation. What I' claim as new and desire to secure by Letters Patent is:

An electric connector comprising a one-piece molded body composed of relatively soft and flexible rubber, said body being molded free from inserts of any kind intended to aflord attaching means and the same being recessed from one end thereof to provide a pair of flat seats, said body having a central opening formed therein and communicating with said seats to provide a cord passage, a pair of one-piece combined contact jack and wiring terminal members the wiring terminal portions of which are adapted to rest iiatwise against the respective seats, said wiring terminal portions each having an opening formed in the end thereof, and a pair of securing screws respectively penetrating said openings, the shanksoi said screws having threaded engagement with the soft rubber of said body to resiliently and removably secure said combined contact and terminal members in position.

2. An electric connector comprising a onepiece molded body composed of relatively soft and flexible rubber, said body being molded free from inserts of any kind and the same being recessed from one end thereof to provide a pair of flat seats, said body having a central opening formed therein and communicating with said seats to provide a cord passage, a pair of onepiece combined contact jack and wiring terminal members the wiring terminal portions of which are adapted to rest flatwise against the respective seats, said wiring terminal portions each having a tapped opening formed in one end thereof, a pair of binding screws the shanks 0t which have threaded engagement with said tapped openings, said rubber body having recesses formed therein to receive and accommodate the shanks of said binding screws, said wiring terminal portions each having also an open- FRANQIS C. KOLLATH. 

